Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6470907 | Existing pipe cut-off method, existing pipe slitting method, piping structure, and valve insertion method for inserting a valve in a line without stopping passage of water or fluid | Toshiyuki Sato, Hideshige Homma, Gumpei Yokoyama | 2002-10-29 |
| 6357471 | Valve insertion method and cutting tool | Toshiyuki Sato | 2002-03-19 |